<![CDATA[This study investigates the impact of implementing the Numbered Heads Together (NHT) cooperative learning model on Indonesian writing competence in fifth-grade students at SDN 04 Ngeling Jepara, who previously showed low proficiency. The study adopts a pre-experimental approach with a One-Group Pretest-Posttest design. The research participants include the entire fifth-grade population of 29 students, selected using a saturated sampling technique. Data on writing ability were obtained through pre- and post-tests, which were then statistically analyzed using the Paired Samples t-test. The analysis results showed substantial progress, with the average writing ability score increasing from 49.3 in the pre-test to 82.5 in the post-test. The t-test yielded a significance value of 0.000 (p 0.05), confirming the strong impact of the intervention. The effectiveness level of this model was categorized as moderate, with an N-Gain score of 0.67. Thus, it can be concluded that the implementation of the NHT model significantly and effectively contributed to the improvement of students' writing skills.]]>
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